Say that the refrigerator in a furnished student flat is a shared space that all of the flatmates have access to (although they only store and eat their own food). Carefully explain how this shared refrigerator could lead to a Tragedy of the Commons problem. Identify and explain one way that the landlord (as a 'pseudo-government') could act to reduce this problem, and one way that the problem could be solved privately (i.e. by the flatmates themselves).